Semantic HTML means using HTML elements that describe the meaning and role of content — <h1>–<h6> for headings, <ul>/<ol> for lists, <table> for tabular data, <article>, <nav>, and so on — rather than generic <div>s styled to look right.
Why it matters for AEO
Crawlers and AI systems parse pages by structure. Semantic markup makes your content’s hierarchy and meaning explicit, which makes it easier to extract clean, self-contained answers:
- Headings signal topic structure, helping engines locate the section that answers a query.
- Lists and tables package facts into liftable, quotable units.
- Proper structure improves extractability — a key driver of citations.
What to do
Use real heading elements in order, mark up lists and tables as lists and tables, and avoid burying meaningful structure in undifferentiated <div>s. It’s a quiet, low-effort technical lever that compounds with good content. See structured data for AI visibility and the related concept of structured data.